Caller ID Module

I don't suppose there is a better commented tutorial for using the Caller ID Module - http://learn.linkspr...call-id-module/- is there? The code provided has no commentary at all and the "datasheet" doesn't say anything about arduino commands for using this module, only the timing and hexidecimal codes returned by the unit.

Yeah, neither of those were very self-explanatory either.. or rather the forum ink wasn't. The search only resulted in a few links back to the (unhelpful) tutorial... or that was all I could find, anyway.